Improvement in steam-generators



n einem esta @strut-@fitta t A r 'rHoMAss. sPEAKMAN, or CAMDEN, Newl JERSEY.

" Letters P/tent No. 90,033, dated May 11, 1869.

rMPRQvEMENT IN STEAM-GENERATQRS.

The Schedulel referred toin these Letters Patedt and making part 0f the same.

. Beit known that I, THOMAS S. SPEAKMA'N, of the city and countyof Oamden, and State of New J ersey,`

have invented anewand `useful Improvement in Fan- Attachments to Steam-Generators; and `I .do hereby declare the following tolbe a fulla/nd correct description of the same,suiicient to enableothers skilled in the art to which my invention appertains to fullyunderstand and apply the same, reference` being had to the accompanying drawings, which make part of this specification,`and -in which- Figure'l is a vertical cross-section y'of' my improvement, in line x x, iig. 2;

.Figure 2 is a vertical cross-section, in line y y, fig. l. alud` s" Figure 3 is a detaeheaviejw of the door of the fanchamber. i

, Like letters 4(pf-reference indicate like parts in the several figures; t

The nature of my invention consists in the arrange-k mentof a fan` in such relation tothe steam-boiler and nre-grate of an engine that `the products of combustion, instead ofpassing oi through the smoke-stack a or chimney, are repassed continually under and through theiire, so that a perfect combustion, and consequent saving offuel and heat, is'attained; orthe fan may be used merely to 'draw off the` products `of combusi the boiler. 2

From the jacket O, near the pipe D, a pipe, E, leads to .a chamber, or compartment, F, provided with a door,Gr. i j

` In `this compartmentgfin a suitable position, issituateda fan-case, 1:1,in which afan,1I, moves in suitable bearings. 3, j t j v i The casev H .extends rearwardly, in shapeof a pipe,

` H,`,throu"gh the wall of chamber F, to a suitable posi- `tion under the nre-grate B.

The shaft 'i ofrthe fan) I is made hollow, and ends `on one sideyoutfside of the wall of chamber F, in a hollow belt-wheel, J, and is provided, between `the wallof chamber F `and case H nearestpto belt-wheel j J, with an openingror openings, j.

rlhe case H is provided with openmgs It, in a line llabove the dischargepipe 'f, leading out of tle cham- `/ber F. i`

llhe door G this chamber is provided with an opening, g, covered by a slide, l.

rI he stack D and pipe E are each provided with a i dampend and e.

v With the products of combustion escaping from the smokestackorlchimney of an engine, which might be again passed through the ire, a large percentage of heat is lost, which,by my invention, is utilized; I

` In starting the ii're, the damper-c is closed, yand the 'damper d opened. Thus a draught is created, which startsjthe ire. When the fire is well under way, the damper'd is closed, and the damper e'opened.

Motion having been "imparted to belt-wheelJ from any suitable motor, the fanis rotated in the direction .of the arrow, iig. l, and creates a partial vacuum in thechamber `1i,'which allows the products of combustion to passy from jacket C, through pipe E, into the chamber, and through openings h, into the caseH,

whence they are forced, by the fan, through the pipe H', to, under, and through the nre, where they are 'more thoroughly consumed, passing up through and adding heat to the fire. In this manner, the products of y combustion are continually circulated, and cannot` escape.

To supply the necessaryl amount of atmospheric air, in order to obtain a better combustion, the opening, g,

in door G of chamber F ismade, and the supply regulated by slide'l.

The continual and steady passage ,of the products of combustion and heat through chamber H very g quickly heats the same, and ally contained in it, and

Vwould melt'or destroy the fan, were it not for the ad mission of a' stream of cold water, to prevent this. The end of shaft/i not provided with, the belt-wheel may" run in a box, and be connected, by a pipe, to a hydrant or any other headvof water, which ows through shaft i, into belt-wheel, J, and is forced out through openings j, into chamber F, filling the ysame to aline `even with the discharge-pipe f, which' latter prevents the chamber from filling as high as` the openings h of case H, but high enough to cover the pipe H.

The rear wall of chamber F may, at the bottom,

connect with the wall supporting the uboiler, so as to Vallow the water to cover the pipe H to the point where it passes in under the grate. In certain classes of engines, this circulation of the products of combustion could not be suitably applied,

and still the necessity exists of preventing `the smoke yfrom escaping through the stack, and being carried by the air to all surrounding objects. In this case, instead of carryingjthe pipe H under the nre-box, it maybe led to a tank or any other suitable reservoir of water, and under the surface of the latter, so that the productsof combustion are condensed, and made to float on the surface. water through such tank or reservoir is kept up, the products of combustion will be carried o with it continually.

In steamboats or floating engines, the pipe 'H' may be carried through the side of the vessel directly into j the water, without the use of an intermediate tank.

l 'may employ water, impregnated with lime, or its equivalent, in sufficient quantity, as necessity may require, to facilitate the absorption ot' the carbonio acid generated by the combustion of the fuel.

Having thus described my invention,

And -if a constant now.` of ,A

What I claim as new, and desire to secure by Letters Patent, is-

1. The construction :md arrangement of the hollow shaft ,l provided with openings j, fzm I, and hollowA belt-wheel J, as set forth.

. 2. The lurallngemcnt of the discharge-pipe f below the liuc of the openings h of fan-case H, substantially as described.

3. rlhe combination, with the boiler A and jacket C, of the Chamber F, dampers d e, fan-case H, pipe H', discharge-pipe f, and fan I, substantially as set forth.

4. The arrangement of chamber VF, fan-ease H, and connecting-pipe H', whereby to surround the fan-case and pipe with water, so as to cool the same, and at the same time absorb the carbonio acid of the products of combustion, substantially :is described.

Witnesses: THOMAS S. SPEAKMAN ALEXR A. C. KLAUGKE. WM. C. MCINTIRE. 

